Turbine blade platform sealing and vibration damping apparatus

Details Turbine blade platform sealing and vibration damping apparatus Turbine blade platform sealing and vibration damping apparatus

F - Mech Eng,Light,Heat,Weapons

01

D

170/60

F01D 5/22 (2006.01) F01D 11/00 (2006.01)

Patent

CA 1279017

ABSTRACT OF THE DISCLOSURE A gas turbine rotor blade platform sealing and damping system has elongated symmetrical insert elements of equilateral triangular cross-section loosely received within complementary shaped pockets at the spacing gaps between opposing convex and concave airfoil side edges of adjacently mounted blade platforms. The inserts and pockets are relatively configured to provide self-orientation of the inserts into gap sealing and vibration damping engagement with the platform edges when acted upon by centrifugal force due to rotor rotation. The convex platform edge is thickened at the point of closest proximity with the convex side of the airfoil. Alternative embodiments utilize insert grooves for increased leakage of cooling gas past the platform edges and incorporate a central bore for mass reduction.

573836

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